MuseScore/libmscore/line.h

//=============================================================================
//  MuseScore
//  Music Composition & Notation
//
//  Copyright (C) 2002-2011 Werner Schweer
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License version 2
//  as published by the Free Software Foundation and appearing in
//  the file LICENCE.GPL
//=============================================================================

#ifndef __LINE_H__
#define __LINE_H__

#include "spanner.h"
#include "mscore.h"

class QPainter;

namespace Ms {

class SLine;
class System;
class MuseScoreView;

enum { GRIP_LINE_START, GRIP_LINE_END, GRIP_LINE_MIDDLE };

//---------------------------------------------------------
//   @@ LineSegment
///   Virtual base class for segmented lines segments
///   (OttavaSegment, HairpinSegment, TrillSegment...)
//
///   This class describes one segment of an segmented
///   line object. Line objects can span multiple staves.
///   For every staff a segment is created.
//---------------------------------------------------------

class LineSegment : public SpannerSegment {
      Q_OBJECT

   protected:
      virtual bool isEditable() const { return true; }
      virtual void editDrag(const EditData&);
      virtual bool edit(MuseScoreView*, int grip, int key, Qt::KeyboardModifiers, const QString& s);
      virtual void updateGrips(int*, QRectF*) const;
      virtual void setGrip(int grip, const QPointF& p);
      virtual QPointF getGrip(int) const;
      virtual QPointF gripAnchor(int) const;

   public:
      LineSegment(Score* s);
      LineSegment(const LineSegment&);
      virtual LineSegment* clone() const = 0;
      virtual void draw(QPainter*) const = 0;
      SLine* line() const                         { return (SLine*)spanner(); }
      virtual void reset();
      virtual void spatiumChanged(qreal, qreal);
      virtual QPointF pagePos() const;
      virtual bool isEdited(SpannerSegment*) const;

      friend class SLine;
      virtual void read(XmlReader&);
      bool readProperties(XmlReader&);

      virtual QVariant getProperty(P_ID id) const override;
      virtual bool setProperty(P_ID propertyId, const QVariant&) override;
      virtual QVariant propertyDefault(P_ID id) const override;
      };

//---------------------------------------------------------
//   @@ SLine
///    virtual base class for Hairpin, Trill and TextLine
//---------------------------------------------------------

class SLine : public Spanner {
      Q_OBJECT

      Spatium _lineWidth;
      QColor _lineColor;
      Qt::PenStyle _lineStyle;
      bool _diagonal;

   public:
      SLine(Score* s);
      SLine(const SLine&);

      virtual void layout() override;
      bool readProperties(XmlReader& node);
      void writeProperties(Xml& xml, const SLine* proto = 0) const;
      virtual LineSegment* createLineSegment() = 0;
      void setLen(qreal l);
      virtual const QRectF& bbox() const override;

      virtual QPointF linePos(int grip, System** system);

      virtual void write(Xml&) const override;
      virtual void read(XmlReader&) override;

      bool diagonal() const               { return _diagonal; }
      void setDiagonal(bool v)            { _diagonal = v;    }

      Spatium lineWidth() const           { return _lineWidth;            }
      QColor lineColor() const            { return (_lineColor == Qt::black)? curColor() : _lineColor; }
      Qt::PenStyle lineStyle() const      { return _lineStyle;            }
      void setLineWidth(const Spatium& v) { _lineWidth = v;               }
      void setLineColor(const QColor& v)  { _lineColor = v;               }
      void setLineStyle(Qt::PenStyle v)   { _lineStyle = v;               }

      LineSegment* frontSegment() const   { return (LineSegment*)spannerSegments().front(); }
      LineSegment* backSegment() const    { return (LineSegment*)spannerSegments().back();  }
      LineSegment* takeFirstSegment()     { return (LineSegment*)spannerSegments().takeFirst(); }
      LineSegment* takeLastSegment()      { return (LineSegment*)spannerSegments().takeLast(); }
      LineSegment* segmentAt(int n) const { return (LineSegment*)spannerSegments().at(n); }

      virtual QVariant getProperty(P_ID id) const override;
      virtual bool setProperty(P_ID propertyId, const QVariant&) override;
      virtual QVariant propertyDefault(P_ID id) const override;
      };


}     // namespace Ms
#endif